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February 2-3rd 2013 Clipper/Redeveloper


USCAPEWEATHERAF

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12z NAM, 6z GFS, 0z GFS, 0z EURO, 00z CMC and 00z UKMET models all showed a potential clipper system impacting the region come Saturday night into Sunday morning.  That is the way timing looks right now, but this along with the details could change with each passing run.  NAM is most robust at hour 84 as it shows a well compact low pressure system just southeast of the BM track.  The storm is so compact that even with a track just southeast of the BM will not bring any accumulating snows to SNE.  Temperatures will be quite chilly in this time frame and mixing should not be of concern, even with the GFS showing some mixing as the low hits Nantucket, MA.  Believe the NAM and GFS are too robust and are the northwest side of guidance while the rest are further east.  00z EURO is least robust.

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The GFS/Ukie/GGEM all are in pretty close agreement right now for a 1-3" type event...GGEM and especially Ukie might be a tad more bullish...perhaps minimum advisory snowfall.

Still 5 days out, but kind of nice to see agreement from the globals. Of course, the Euro might come in with a coating again like last night.

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At least this one is getting inside of 5 days and starting to trend better. Still a lot of time though for it to turn to crap. Its a delicate setup with no blocking.

Positives are a pretty high amplitude ridge out west in Canada and certainly no shortage of cold air in place ahead of it.

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Euro ensembles pretty bullish for 2/3 similar to the OP run.

Fairly good agreement for 5 days out on the global models. Been rare this season to see that. Still quite a ways to go though on this threat. If we can get to tomorrow night with it looking even a bit better, then I'll become a lot more interested.

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so your actually worried the big system for mid next week could cut if this happened?

 

Yeah, because we'd likely have no system on 2/3 or a very weak one if the 2/1 "bombs", that one would be long out of the way by 2/5 or 2/6 which could cause limited confluence and hence a more north track for that system.  I think the 2/3 system has more potential for SNE anyway than the 2/1 clipper does so everyone should probably be pulling for the 2/1 clipper to fall flat on its face, remember just last week a clipper that bombed off Delaware ruined the phasing of the next system and as a result we only had the light snowfall across E PA/NJ/NYC instead of the likelihood the northern/southern waves may have phased up if not for the predecessor flattening out the flow a bit.

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